tarrant



W. G. TARRANT. IAEROPLANE WING STRUCTURE. APPLICATION FILED APR. 30. 1919.

Patented Aug. 19, 1919.

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' AEBorh Nn-wme srauorunnl} se sonal; of esi aeiei Patented Aug- 19,1919.

airmen fiiea A ril 30. masses K612938271 To allhohomit ma 0013mm RANT, a subject of the King of Great Britain, residin at Lake House, Byfleet, in thecounty of urrey, England, have invented a new and useful Improvement in Aeroplane-Wing Structures, of which the following is a specification.

This invention relates to improvements in the structure or framing of wings of aeroplanes.

The invention is illustrated by the accompanying drawings, Figure 1 of which is a plan of part of the framing of the wing of an aeroplane, Figs. 2 and 2 are parts of a section on the line A-A, Fig. 1, Fig. 3 is an. enlarged View of part of Fig. 2, and Fig. 4 is a section on the line B-B, Fig. 1. Fig. 5 is an enlarged view of the leading edge of a rib.

' 1 is the front spar and 2 the rear spar which run the Whole length of the wing and on which are threaded at suitable intervals apart ribs each of which consists of a flange 3 and a Web 4, this latter being cut away at the spars. The spar l is composed of longitudinal members 5 the inner surfaces of which are grooved to receive beads 6 on inclined braces 7 which are arranged to cross one another, as seen in Fig. 4. In front of the spar 1 two strips of wood 8 are secured one on either side of the web 4 and between the middle portions of these strips is inserted a tongue or plate of wood 9 which passes through the spar 1 between the top and bottom longitudinals, while behind the spar two strips 10 similar to the strips 8 are. secured one on each side of the web and of the rear of the tongue 9, the grain of the strips being at right angles to that of the tongue. Pins 11 are employed to fasten the parts together wherever it is thought desirable in addition to the glue yvhich is employed wherever possible, for instance, between the parts 5 and 7. The rear spar 2 is similar to the front spar 1 and vertical strips and a tongue are employed as with the front spar.

At the leading edge of the wing, which consists of a piece 111 joining the upper and lower flanges 3 and the upper and lower webs 4, I also employ two strips 12 one on either side of the webs and between them a tongue 13. 14 arecross braces joining the upper and lower webs, while stringfi ers 15 jparallel to the spars are employed Be it known that I, WALTER GEORGE TAR-'-"' at suitable positions, packing blocks 16 being arranged at the points where the stringers pass through the ribs.

The wing structure is put together as follows:-

The two spars 1 and 2 are secured on trestles at the proper distance apart. A strip 8 and a strip 10 are then glued to the web, the one in front and the other behind each spar in each rib, the tongues 9 are then glued to the strips and the second strips 8 and 10 are then glued to the Web and tongue, the one in front and the other behind each spar, the necessary pins 11 are inserted and the stringers 15 are placed in position.

What I claim is 1. In an aeroplane wing structure, the combination of a number of ribs, a front spar and a rear spar both passing through the ribs, a pair of strips in front of each spar in each rib, a pair of strips behind each spar in each rib and a tongue passing through each spar in each rib and having its front portion lying between the two strips of the front pair and its rear portion lying between the two strips of the rear pair.

2. In an aeroplane wing structure, the combination of a number of ribs, a front I spar and a rear spar both passing through the ribs, a pair of strips in front of each spar in each rib, a pair of strips behind each spar in each rib, a tongue passing through each spar in each rib and having its front portion lying between the two strips of the front pair and its rear portion lying between the two strips of the rear pair, and a plurality of stringers parallel to the spars and secured to the ribs.

3. In an aeroplane wing structure, the combination of a number of ribs, a front spar and a rear spar both passing through the ribs, a pair of strips in front of each spar in each rib, a pair of strips behind each spar in each rib, a tongue passing through each spar in each rib and having its front portion lying between the two strips of the front pair and its rear portion lying between the two strips of the rear pair, a plurality of stringers parallel to the spars and secured to the ribs, and packing pieces situated at the points where the stringers pass through the ribs.

4. In an aeroplane wing structure, the

combination of a number of ribs, a. front stripsadjaeent to the leading edge and a to spar and a rear sparboth passing through tongue between these strips.

the ribs, a pair of strips in front ofea'ch' In testimony that I claim the foregoing as spar in each rib, a pair ofstripsbehi mi each my 1 invention-"I have signed my name this spar in each rib, a tongue passing through twentieth day of March 1919.

each spar in each rib and having its front 'WALTER GEORGE TARRANT. portion lying between the two strips of the Witnesses: I I front pairand. its-rear portion lying between- J. PATGHING, the two strips of the rear pair,.-a nd a pair of 7 P. Wn'rsoN- WALKER.

Copies of thiapatent may he obtained 1011 fivecent; each, by addressing lie flommissioner o! lfietqent s,

Washington, D. 0. v 

